| Viking Formation Stratigraphic range: Late Albian |
|
|---|---|
| Type | Geological formation |
| Underlies | Big River Formation |
| Overlies | Joli Fou Formation |
| Thickness | up to 50 metres (160 ft)[1] |
| Lithology | |
| Primary | Sandstone |
| Other | Conglomerate, chert |
| Location | |
| Named for | Viking, Alberta |
| Named by | Dowling et al., 1919 |
| Region | Alberta, Saskatchewan |
| Country | Canada |
The Viking Formation is a stratigraphical unit of Cretaceous age in the Western Canadian Sedimentary Basin.
It takes the name from the town of Viking, Alberta, and was first described in the Viking-Kinsella oil field by Dowling in 1919.[2]
Contents |
The Viking Formation is composed of fine to coarse grained sandstone with interbeds of conglomerate and cherty conglomeratic sandstone. [1] Nodular phosphorite, coal fragments and concretionary siderite occur in the coarse beds.
Oil is produced from the Viking Formation in eastern and central Alberta as well as in central-west Saskatchewan.
The Viking Formation had an initial established recoverable oil reserve of 88.7 million m³, with 66.8 million m³ already produced as of 2008.[3] Gas reserves totaled 277.9 million m³, with 103.4 million m³ already produced.[4]
The Viking Formation occurs in the sub-surface of central and eastern Alberta and in west-central Saskatchewan. It reaches a maximum thickness of 50 metres (160 ft) in central Alberta and thins out to 40 metres (130 ft) in Saskatchewan. Thinner sandstone beds can be recognized into western Alberta.
The Viking Formation is conformably overlain by the Big River Formation and conformably and unconformably underlain by the Joli Fou Formation.[1]
It is equivalent to the Bow Island Formation in southern Alberta, to the Newcastle Formation in North Dakota, to the Ashville Formation in Manitoba, the Pelican Sandstone in north-eastern Alberta and the Flotten Lake Sand in central Saskatchewan. It can be correlated with the Cadotte Member of the Peace River Formation in north-western Alberta.